Well, it's a strange book. Basically, it's a collection of insights that Allen came up with writing his email newsletter. They're gathered into sections, but they don't necessarily relate to each other very well. He also veers off into new-agey stuff too much. Finally, I'm still not convinced that this whole idea that "the brain has limited RAM" is even true. Let's ask Stephen Pinker what he thinks, then maybe I'll get on board. This idea permeates the book, and the point is made over and over. Can't GTD just be a good way to organize stuff? Why does it have to be the meaning of life too?